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I need to access a serial device in my VirtualBox guest (Windows XP). My host system is ArchLinux 64-bit. I configured the VirtualBox serial port as follows:

  • Port: COM1
  • IRQ: 4
  • I/O Port: 0x3F8
  • Port Path: /dev/ttyS0

Now, I am pretty certain it is /dev/ttyS0 as when I do a cat or echo to/from the device, I get nothing. Whereas, with the other paths, I get input/output errors.

I don't believe it is a permissions issue as I belong to the uucp group which is the owning group of the device.

Any ideas what I can try?

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  • I also ran VirtualBox as root and was unable to connect my serial device as expected.
    – Walter
    Aug 22, 2011 at 13:15

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